← L² Lab
⚖️ Moral Reasoning
Card 04
🗣️ 🤥 ❓

A murderer asks you where your friend is hiding. Is it wrong to lie to protect your friend?

💭 Think About It

"Don't lie" is one of our earliest moral lessons. But almost everyone would lie to the murderer! This reveals something important: even rules that seem absolute can have exceptions.

Is it wrong to lie to the murderer?

🎯 Explain your thinking

Why did you choose this answer?

🌈 Different Perspectives to Consider
It Depends Understand why rules exist

Lying is wrong for specific reasons. When those reasons don't apply, the rule might not either. But most lies aren't justified—be honest with yourself.

Always Wrong Maintain integrity

You control only your own truthfulness, not what others do. If everyone made exceptions, lying would spread. Kant said never lie.

Lie to Save Lives matter more

The murderer forfeited the right to truth. Saving an innocent life is more important than abstract truthfulness.

🤔 Which thinking lens(es) did you use?

Select all the lenses you used:

👨‍👩‍👧 For Parents & Teachers

🌱 A Small Everyday Story

"Never lie!" was the rule.
Then came the surprise party planning.
"Does Mom suspect anything?"
They had to lie to keep the secret.
"So lying is OK for surprises?"
"Some lies are gifts. Some are weapons.
The same action can be kind or cruel
depending on intent and impact."

See more guidance →

🧠 Thinking habits this builds:

  • Understanding WHY moral rules exist
  • Recognizing when reasons behind rules don't apply
  • Distinguishing legitimate exceptions from convenient excuses

🔄 When ideas are still forming:

Some learners may use this to justify too many lies. Help them see that the murderer case is EXTREME—most lying isn't justified just because we want something.

Key concepts (for adults): Kantian ethics, categorical imperative, lying to the murderer problem, rule consequentialism.